Division of Air Quality - Latest Available Air Quality Index Readings



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Monitoring Data >> Latest Available Air Quality Index Readings

This table shows the current maximum Air Quality Index (AQI) readings representing the indicated Metropolitan Statistical Areas over the past 24 hours and may include data from yesterday. The supporting data have not been fully validated (more information).

Note: In 2007 the Federal EPA revised the National Ambient Air Quality Standard for PARTICULATE MATTER(2.5) maximum 24-hour concentrations to a lower threshold. An equivalent revision is appropriate for the Air Quality Index, but EPA has not yet provided one. However, many air quality reporting organizations have modified their local reports and forecasts to reflect the new standard more accurately. In June 2008, we similarly revised the threshold between moderate and unhealthy for sensitive groups in the report displayed below. (more information)

This page was last updated on: Wed Jul 23 2008 02:00:00 PM EDT

Entries highlighted in boldface type represent the "critical pollutant" information.

Area	AQI	Responsible Pollutant	Pollutant Concentration	Color Code	Air Quality	Time of Maximum
RALEIGH - DURHAM - CHAPEL HILL	102	OZONE	0.077 ppm	ORANGE	UNHEALTHY FOR SENSITIVE GROUPS	7/22/08 6:00 PM
	83	PARTICULATE MATTER(2.5)	28.6 µg/m3	YELLOW	MODERATE	7/22/08 7:00 PM
	19	PARTICULATE MATTER(10)	21.0 µg/m3	GREEN	GOOD	7/22/08 2:00 PM
WINSTON-SALEM - GREENSBORO - HIGH POINT	86	OZONE	0.071 ppm	YELLOW	MODERATE	7/22/08 7:00 PM
	74	PARTICULATE MATTER(2.5)	25.0 µg/m3	YELLOW	MODERATE	7/22/08 7:00 PM
	29	PARTICULATE MATTER(10)	31.3 µg/m3	GREEN	GOOD	7/22/08 2:00 PM
HICKORY - MORGANTON - LENOIR	62	OZONE	0.064 ppm	YELLOW	MODERATE	7/22/08 9:00 PM
HICKORY - MORGANTON - LENOIR	55	PARTICULATE MATTER(2.5)	17.3 µg/m3	YELLOW	MODERATE	7/22/08 8:00 PM
FAYETTEVILLE	101	OZONE	0.076 ppm	ORANGE	UNHEALTHY FOR SENSITIVE GROUPS	7/22/08 8:00 PM
FAYETTEVILLE	71	PARTICULATE MATTER(2.5)	23.7 µg/m3	YELLOW	MODERATE	7/22/08 8:00 PM
WILMINGTON	86	OZONE	0.071 ppm	YELLOW	MODERATE	7/22/08 7:00 PM
WILMINGTON	79	PARTICULATE MATTER(2.5)	26.9 µg/m3	YELLOW	MODERATE	7/23/08 6:00 AM
ASHEVILLE	76	PARTICULATE MATTER(2.5)	25.5 µg/m3	YELLOW	MODERATE	7/23/08 12:00 AM
ASHEVILLE	52	OZONE	0.061 ppm	YELLOW	MODERATE	7/23/08 3:00 AM
GREENVILLE	74	PARTICULATE MATTER(2.5)	24.8 µg/m3	YELLOW	MODERATE	7/22/08 2:00 PM
GREENVILLE	69	OZONE	0.066 ppm	YELLOW	MODERATE	7/22/08 5:00 PM
CHARLOTTE - GASTONIA - ROCK HILL	Air Quality Index courtesy of Mecklenburg County Department of Environmental Protection

General Information About AQI
Frequently Asked Questions
Current Data from Other Areas in NC

National AQI Overview (EPA AIRNOW)
National Ambient Air Quality Standards (NAAQS)
NC Air Awareness Program